Category: Johnson Controls

General Purpose Application Controllers

(CG Series)

The CG series general purpose application controllers

are well-suited for controlling a wide variety of facility

and HVAC equipment, including fan coils, air handling

units, packaged HVAC equipment, and central plant

equipment. CG series controllers run pre-engineered and

user-programmed applications. There are two models

of CG series controllers available with two different sets

of onboard input/output interfaces (Table 1). You can

expand their I/O interfaces by connecting XPM or IOM

series I/O expansion modules.

CG series equipment controllers include an integral real

time clock, which enables the controllers to monitor and

control schedules, calendars, and trends, and operate for

extended periods of time as standalone controllers when

offline from the Metasys system network.

CG, CV family devices feature removable, color-coded,

keyed, and labeled terminal block plugs for the input

and output, supply power, and communications bus

terminations.

CG, CV family devices feature rotary switches that allow

you to set a valid and unique device address for each

device on the bus. A blank space is included on the cover

for recording the device address.

Integral mounting clips and a DIN rail track on the back

plate of the CGM controllers and XPM devices allow you

to easily mount the device either on a horizontal section

of 35 mm DIN rail, or screw mount on a flat surface with

three integral mounting clips on the device.

An integral EOL switch on MS/TP devices allows you to

enable the device as a bus terminating device, which

when properly configured, reduces reflected noise on the

bus and improves bus communication.

Hardware and installation

Metasys equipment controllers and expansion modules

are encased in a durable plastic housing. The plastic

housing may eliminate the need for a separate enclosure

for plenum-rated construction. Check specific controller

documentation and regional, national, and local code

requirements for appropriate applications.

Metasys CG, CV family devices feature bright, color-coded

LEDs, visible on the controller cover, that indicate the

supply power, communications bus, and EOL switch

status, as well as a variety of fault conditions to aid

troubleshooting the controller and bus.

The equipment controllers ship with a default state that

can assist in validating the wiring of the input and output

terminals prior to download of an application file. When

the controller is powered on in this state, the Fault LED

will flash in a pattern of two quick blinks and then a long

pause.

Communications protocols

The CGM and CVM controllers can communicate using

BACnet MS/TP, N2. or wireless Zigbee. The controllers

auto-detect the protocol that is connected, which enables

the same controller to support multiple communication

protocols without the need to purchase a special model

per protocol, and without extra manual setup.

The XPM expansion modules can communicate using

BACnet MS/TP, or wireless Zigbee® using a ZFR/ZFR Pro

Wireless Field Bus Router (on the FC Bus only). By default,

the XPM expansion modules communicate using the

BACnet MS/TP protocol.

The BACnet MS/TP protocol is a standard for ANSI,

ASHRAE, and the International Standards Organization

(ISO) for building controls.

The CGM and CVM controllers can be used as functional

replacements for legacy N2 controllers. The N2-capable

MS/TP equipment controller models provide a cost

effective upgrade and modernization path for customers

with existing N2 controllers.

The CGM and CVM controllers can also be installed in a

wireless application using a ZFR/ZFR ProWireless Field Bus

Router, see Related products.

Network Diagram with Equipment Controllers

Integration to the Metasys system

supervisory devices

The CG and CV series equipment controllers are designed

to integrate seamlessly into the Metasys system by

connecting to, communicating with, and being supervised

by Metasys network engines (including SNE, SNC, NAE,

NIE, and NCE series network engines). 

This seamless integration of equipment controllers with

Metasys network engines delivers coordinated, system-wide

control and enables building operators to monitor and

adjust equipment controllers from the Metasys system UI.

In addition, service personnel can view equipment

controller information locally through an optional local

controller display (MS-DIS1710-0) available for equipment

controllers, or through the optional Mobile Access Portal

(MAP) Gateway.

BACnet Testing Laboratories (BTL) listed and certified

Ensures openness and interoperability with other BTL

listed devices. BTL is a third-party agency, which validates

that BAS vendor products meet the BACnet industry

standard protocol.

BACnet automatic discovery

Supports easy controller integration into a Metasys BAS.

Wireless ZFR and ZFR Pro support

Provides a wireless alternative to hard-wired MS/TP

networking, offering application flexibility and mobility

with minimal disruption to building occupants, and also

simplifies and speeds up replacements.

Integral real-time clock

An integral real-time clock, which enables the controllers

to monitor and control schedules, calendars, and trends,

and operate for extended periods of time as stand-alone

controllers when offline from the Metasys system network.

Pluggable screw terminal blocks

Pluggable input/output wiring terminal blocks provide

electrical installers and field technicians the ability to

quickly and easily install and service a controller without

the need to disconnect and reconnect the input/output

wiring.

Default state for equipment controller Input/Output

wiring validation

Enables validation of the input and output terminals’

wiring prior to download of an application file.

Background transfer coupled with enable/disable logic

options in Controller Configuration Tool (CCT)

Saves field technicians’ time, enables productivity and

minimizes equipment disruption, since the controllers are

operating while file updates take place in the background

and the application can be left disabled until the system is

ready to run.

SA Bus commissioning improvements

Saves field technicians time when commissioning SA Bus

devices by enabling an equipment controller to transfer

and apply firmware files to all the SA Bus devices (XPM,

IOM, NS8000) connected to it at the same time.

Small, convenient package size

Facilitates quick field installation and efficient use of space

without compromising control performance

Features and benefits

Sleek and modern packaging and styling

Provides a modern, aesthetically pleasing industrial

design.

Standard hardware and software platform

Uses a common hardware design throughout the

family line to support standardized wiring practices and

installation workflows. Also uses a common software

design to support use of a single tool for control

applications, commissioning, and troubleshooting to

minimize technical training.

High memory capacity and fast processing power

Provides application engineers with the horsepower to

meet sophisticated control requirements.

Auto-Tuned Control Loops

Reduce commissioning time, eliminate change-of

season re-commissioning, and reduce wear and tear on

mechanical devices.

Patented Proportional Adaptive Control (P-Adaptive)

and PRAC

Provides continuous loop tuning.

Standard BACnet protocol

Provides interoperability with other Building Automation

System (BAS) products that use the widely accepted

BACnet standard.

Models to support both BACnet MS/TP and N2. with

auto-detection of the communications protocols

Controller auto-detects the BACnet MS/TP or N2 protocol

that is connected to it, which enables the same controller

to support multiple communication protocols without

the need to purchase a special model per protocol, and

without extra manual setup.

XPM Series Expansion Modules

The M4-XPM series I/O expansion modules can serve

in one of two capacities depending on where they are

installed in the Metasys system. When installed on

the Sensor/Actuator (SA) Bus of a Metasys equipment

controller, an XPM expands the input and output

interfaces that can be used with that equipment

controller. When installed on the Field Controller (FC) Bus

of a Metasys network engine, an XPM can be used as I/O

point multiplexors to support monitoring and control from

a Metasys network engine. The point multiplexor can also

be useful for sharing points between other equipment

controllers on the FC Bus using peer-to-peer connectivity.

Background transfer coupled with enable/disable logic

options in Controller Configuration Tool (CCT)

Saves field technicians’ time, enables productivity and

minimizes equipment disruption, since the controllers are

operating while file updates take place in the background

and the application can be left disabled until the system is

ready to run.

SA Bus commissioning improvements

Saves field technicians time when commissioning SA Bus

devices by enabling an equipment controller to transfer

and apply firmware files to all the SA Bus devices (XPM,

IOM, NS8000) connected to it at the same time.

Small, convenient package size

Facilitates quick field installation and efficient use of space

without compromising control performance

Overview

The Metasys General Purpose Application Controllers

(CGs), VAV Box Controllers (CVs), and Input/Output

Expansion Modules (XPMs) are a new, modernized family

of equipment controllers which integrate in the web-based

Metasys system.

CG and CV Series Equipment Controllers

The CG and CV series equipment controllers are versatile

equipment controllers designed to monitor, control,

and integrate a wide variety of HVAC and other building

equipment. CGM controllers support BACnet® MS/

TP and N2 communication protocols, and auto-detect

which protocol is connected to it. In MS/TP mode, these

equipment controllers are BACnet network-compliant

devices. Controllers running in N2 mode can be used to

maintain or modernize sites with installed legacy Johnson

Controls® controllers.

The CG and CV series equipment controllers feature an

advanced design that provides optimum performance.

These controllers run pre-engineered and user

programmed applications and provide the I/O required

to monitor and control a wide variety of HVAC equipment.

These controllers are designed to install easily and

communicate through standard RS485 BACnet MS/

TP protocol, which enables you to build a variety of

equipment controller network applications, ranging from

simple fan coil, heat pump, or VAV control applications

to advanced central plant management and stand-alone

applications. The CG and CV series equipment controllers

also provide easy access to power, network, and field

terminations.